These guys are now 7 ready(WHERE'S MY FUCKING ZEDUS 7 GUMI), and i guess this is a review.
I mean there's nothing to say here
Why am I wasting your time
Jesus, time to start the review
healer goddess waifu hello.
Just want to say that the Grand Quest art looks glorious for Aurelia/Zedus/Ultor(as you can see Aurelia is my profile pic)
Anyways actual stats:

Overview:
I have to say, some people have been disappointed in Aurelia, to which I say everyone is dumb.
Let's start with the fact that her LS is fucking terrible(plz sacrifice DEF/REC boost for HP boost and make griel RIP)
Her ES is decent, with BC on attack(not really that goo), and a 40% boost to DEF/REC. Now is the time for me to point out that Harp of Aurelia is a recovery sphere, which means you can stack it with stat+ spheres, basically making Aurelia a monster in DEF/REC stats/
Her BB has reallllly high HoT. Only Selena actually beats her out in HoT honestly. The status management is nice, but it's useless if your on auto quite honestly, and...
DoT?
On a healer?
Gumi wat.
But you want to know where Aurelia's usage comes from?
Her fucking SBB. 80% REC to DEF convert is INSANE. That's a huge fucking DEF buff with a REC buffer that stacks with actual defense buffers. The next closest thing to this is...Reeze with 40% REC to DEF? Which is unreleased in Global? Oh god.
Aside form the fact that her conversion is fucking ridiculous, let's look at the fact that she also HEALS a shit ton. Aurelia heals more then then Elimo and Tree. And she also attacks. Hello OP. The only thing that makes this SBB not make her amazing on her own is the fact that they stuck 4 BC regen on her, which clashes with future 7 BC regen units. Why couldn't they have switched this with the DoT?
The UBB is the Tree's UBB, nothing special.

Usage:
Quests: anything is good here
Trials: A DEF buff and super heal is going to be super good for any Trial. Plus her BB gives her even more want of use.
Arena: Fuck no.
Raids: That DEF buff is SUPER sexy in Raids, along with her healing capabilities.
FH: No bruh.

Overview: Hadaron fucking lied to everyone, but I am glad he did honestly.
Let's talk Arena. Hadaron is meta as fuck in Arena. Remember when everyone thought Hadaron was the new Zurg(and were wrong).

Well now Hadaron's the new Toutetsu.
Hadaron's LS is a 130% ATk boost, first turn, and a increase in ATK/DEF as HP is lowered.
A.K.A he has stupid first turn damage like Toutetsu, and only does even more damage and get bulkier as your units health goes down. Hadaron just replaced Toutetsu in the Global arena meta.

Let's talk ES.
A 50% HP boost.
Hadaron's sphere's lack of HP is completely removed.
75% crit damage too. This is very important for later on. His sphere has crit damge immunity, which is nice I guess, and the boost to ATK/DEF based on HP lost hammers his place in the Arena meta.
His BB inflicts status? Honestly it's trash, and is not why it's good.
SBB though.
SBB though.SBB though.
You want to talk 1000% modifier? With a 400% ATK buff, 150% crit damage buff, and a 70% crit rate boost to self?
mother of god
that damage.
Anyways, anytime Hadaron does damage with his SBB, it's going to be ball the walls insane, to the point where he kind of out damages most standard UBB's. Not hard to fill, so you can spam it too. His DEF buff is decent enough, and his crit rate boost is also pretty nice(this guy makes a nice fucking damage core with Ultor)
His UBB is okay, but nothing special.

Usage:
Arena: You should. You really should.
Frontier Hunter: No.
Trials: If your not using him for nukes, don't bring him.
Quests: Don't bully the poor quest bosses man.
Raids: Depends. For stuff like Balmedia, he's a godsend, but for other stuff, he won't be that useful(not bad though.)Rating: 9/10. He does what he does VERY well, and he is pretty much top-class in those roles. But outside those roles, he's not that good(still decent though.)

Overrall, Hadaron and Aurelia are good units, just not as mind-breathtakingly OP as Tridon's Athensphere crew were.